Welcome. Tonight, Hillary Clinton and Bernie Sanders have their one-on-one debate in New Hampshire, where the first primary of the 2016 presidential season will be held next week. Settle in for some excitement: This is the first debate since Clinton narrowly defeated Sanders in the Iowa caucuses, shaking up what many saw as her aura of inevitability as she seeks the Democratic presidential nomination.

You can expect these two to go at each other with guns blazing. Sanders’ finish just behind Clinton in Iowa on Monday seems to have given him extra energy to attack her, and that will likely continue tonight. They’ve been battling over who is more populist; who is tougher on Wall Street; what to do about Obamacare; and a whole lot more.

A look at polls of New Hampshire voters tells the clear story of Sanders’ rise in the Granite State. The Clinton campaign is already downplaying expectations that the former secretary of state will win that state, saying Vermont Sen. Sanders enjoys a “home court advantage” in next-door New Hampshire.

But here’s the obligatory word of caution, folks. Polls also had Donald Trump winning the Iowa caucuses on Monday. He didn’t. And they had Clinton four points ahead. But it took until Tuesday for Clinton’s win over Sanders to be declared, and even then, it was by the thinnest of margins (49.9% for Clinton; 49.6% for Sanders). So don’t take the polls as infallible.

As MarketWatch reported earlier today, Sanders is fundraising off comments from Goldman Sachs Chairman and CEO Lloyd Blankfein, who said the Vermont senator’s campaign “has the potential to be a dangerous moment.”

The biggest difference so far is over what to do with Obamacare. Clinton charges that Sanders wants to “start all over again” with the Affordable Care Act. Her position has been that the law should be build upon, not redone. This is a key split between the two, and each position has its appeal to segments of the Democratic Party.

Sanders denies that he wants to dismantle health care for Americans; quite the opposite. His plan is for universal health care.

Both campaigns are sending their own tweets tonight, by the way. This debate’s coming at you in full force from all directions.

I’ve been criticized for saying this so let me say it again: I believe health care should be a right, not a privilege. #DemDebate

Here it is: Clinton is defending her speaking fees, to Wall Street firms and other organizations including auto dealers. (She made sure to mention those other organizations.) But she’s insisting she went to Wall Street before the financial crisis and did things like call for ending the carried interest loophole.

Sanders has been unrelenting in his criticism of her Wall Street ties, and this could continue to work against her as she battles to appeal to progressives and middle-of-the-road Democrats alike. Sanders insists he doesn’t want Wall Street money in his campaign, and that gets cheers from the corners of the Democratic Party he wants to woo away from Clinton.

It’s turning out to be a competitive primary on the Democratic side. But it’s worth noting that prediction markets see Clinton defeating Sanders by a wide margin for the nomination: 83% to 17% at last check. Those markets have a better record than polls at predicting the eventual nominee.

On foreign policy, Sanders is bringing up a favorite distinction — his vote against authorizing the war in Iraq. That’s a key difference with Clinton, who voted in favor of it. “We must not get involved in perpetual warfare in the Middle East,” he says. He says a key doctrine of his administration would be, we cannot do it alone, we need a coalition.

Clinton is on familiar ground here, having been secretary of state. And she’s telling voters they’re choosing a commander in chief, not just a president. Big cheers for that. But Sanders says it’s judgment, not just experience, and brings up the Iraq vote again.

The issue of Clinton’s emails comes and goes pretty quickly tonight. Sanders says he won’t politicize her use of a private email server, and Clinton said she’s 100% confident nothing will come from an investigation into her emails.

That may make it easier on her in the primary, but there are plenty of Republicans who would use this issue to the hilt in a general election if she’s nominated.